<?php
/**
 * Batch 32 — Tutor LMS tools. Net-new, GPL-2.0-or-later. See NOTICE.md.
 * Inert unless Tutor LMS (TUTOR_VERSION) is active. Courses are the 'courses' CPT.
 */

namespace AskTamMCP\Extensions;

defined('ABSPATH') || exit;

class Batch32 {

    public static function register($registry): void {
        if (!defined('TUTOR_VERSION')) return;

        $def = function (string $name, string $desc, array $props, array $required, string $scope, string $method) {
            $schema = ['type' => 'object', 'properties' => $props ?: new \stdClass()];
            if ($required) $schema['required'] = $required;
            return ['name' => $name, 'description' => $desc, 'scope' => $scope,
                    'handler' => 'AskTamMCP\\Extensions\\Batch32::' . $method, 'inputSchema' => $schema];
        };

        $registry->register($def('tutor_detect', 'Report whether Tutor LMS is active and its version.', [], [], 'read', 'detect'));
        $registry->register($def('tutor_list_courses', 'List Tutor LMS courses (id, title, status).',
            ['per_page' => ['type' => 'integer', 'default' => 50]], [], 'read', 'listCourses'));
        $registry->register($def('tutor_get_course', 'Get one Tutor course: title, price type, lesson count, and enrolled-student count.',
            ['course_id' => ['type' => 'integer']], ['course_id'], 'read', 'getCourse'));
    }

    public static function detect(array $args): array {
        return ['active' => defined('TUTOR_VERSION'), 'version' => defined('TUTOR_VERSION') ? TUTOR_VERSION : null];
    }

    public static function listCourses(array $args): array {
        $posts = get_posts(['post_type' => 'courses', 'post_status' => ['publish', 'draft', 'pending'],
            'numberposts' => (int) ($args['per_page'] ?? 50), 'orderby' => 'title', 'order' => 'ASC']);
        $out = [];
        foreach ($posts as $p) $out[] = ['id' => $p->ID, 'title' => $p->post_title, 'status' => $p->post_status];
        return ['count' => count($out), 'courses' => $out];
    }

    public static function getCourse(array $args): array {
        $id = (int) ($args['course_id'] ?? 0);
        $p = get_post($id);
        if (!$p || $p->post_type !== 'courses') throw new \RuntimeException("Tutor course not found: {$id}");
        $lessons = null; $students = null;
        if (function_exists('tutor_utils')) {
            $u = tutor_utils();
            if (method_exists($u, 'get_lesson_count_by_course')) $lessons = (int) $u->get_lesson_count_by_course($id);
            if (method_exists($u, 'count_enrolled_users_by_course')) $students = (int) $u->count_enrolled_users_by_course($id);
        }
        return ['id' => $id, 'title' => $p->post_title, 'status' => $p->post_status,
            'price_type' => get_post_meta($id, '_tutor_course_price_type', true) ?: 'free',
            'lessons' => $lessons, 'enrolled' => $students];
    }
}